Hi all,
Silly question. I've just thrown together an OpenNebula cluster for
evaluation purposes and have it using a back-end Ceph cluster for storage.
Image creation works, but one thing I observe is that the VMs sit in the
PROLOG stage for a long time. During this process, I see an rbd process
busily copying the image to a temporary rbd for the instance.
The call specifically is a 'rbd copy' command. I see in the manual
pages for rbd:
> clone [parent-snapname] [image-name]
> Will create a clone (copy-on-write child) of the parent
> snapshot. Object order will be identical to
> that of the parent image unless specified. Size will be the
> same as the parent snapshot.
Surely this would be more efficient than creating copies of the images.
Is there a reason why 'copy' was chosen rather than 'clone' in OpenNebula?
--
Stuart Longland
Systems Engineer
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\/ | \ | 38b Douglas Street F: +61 7 3535 9699
SYSTEMS Milton QLD 4064 http://www.vrt.com.au
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